Finding the Third Proportional to 856,978 and 1,258,947

Step by Step Solution

1. Step 1: Write the proportion equation
   856,978 : 1,258,947 = 1,258,947 : x
2. Step 2: Convert to fraction form
   856,978/1,258,947 = 1,258,947/x
3. Step 3: Cross multiply
   856,978x = 1,258,947 × 1,258,947
4. Step 4: Simplify right side
   856,978x = 1,584,947,548,809
5. Step 5: Solve for x
   x = 1,584,947,548,809/856,978
6. Step 6: Final answer
   x = 1,849,461.19